Kinetic fractionation refers to the process by which different isotopes of an element are separated due to differences in their kinetic energies or reaction rates. This phenomenon occurs primarily during physical or chemical processes where the isotopes experience distinct rates of reaction or diffusion because of their mass differences. In kinetic fractionation, lighter isotopes typically move or react faster than heavier isotopes. This results in a non-uniform distribution of isotopes in a product compared to its precursor material.
The Table of Nuclides, often referred to as a nuclide chart, is a graphical representation of all known isotopes of the elements, arranged according to their atomic number (number of protons) and mass number (total number of protons and neutrons). A segmented, wide version of this table typically features a detailed layout that divides isotopes into segments based on their stability and other characteristics, allowing for easier analysis and interpretation.
Reverse Monte Carlo (RMC) is a computational technique used primarily in the fields of materials science and crystallography to model and analyze the structures of materials, particularly those that are disordered, such as amorphous solids or liquids. Unlike traditional Monte Carlo methods, which typically start with an initial model and sample configurations that mimic a known distribution, RMC starts with experimental data and seeks configurations that can reproduce that data.
"The road to hell is paved with good intentions" is a proverb that suggests that good intentions, if not accompanied by appropriate actions or careful planning, can lead to negative outcomes. Essentially, it implies that merely having good intentions is not enough to ensure positive results; one must also take responsible and effective actions. The phrase highlights the importance of being mindful about how one's intentions translate into actions and the potential consequences of those actions.
The term "inverse problem" generally refers to a type of problem in various fields (such as mathematics, physics, engineering, and data science) where one aims to infer or reconstruct the inputs or causes from observed outputs or effects. Inverse problems contrast with "forward problems," where the relationship between inputs and outputs is known, and the goal is to predict the results of certain input conditions.
As of my last knowledge update in October 2023, "Bone Seeker" could refer to various contexts, possibly in literature, gaming, or perhaps even as a term related to archaeology or paleontology. 1. **Literature or Media**: It might be a title of a book, series, or character name in a fantasy or sci-fi setting.
Townsend discharge refers to the phenomenon in gas physics and electrical engineering where an electrical discharge occurs in a gas due to the ionization of gas particles. Named after the physicist J. S. Townsend, who studied the behavior of electric discharges in gases, this process is fundamental to understanding how gases can conduct electricity under certain conditions. In the Townsend discharge process, when a sufficiently high voltage is applied across two electrodes in a gas, free electrons are accelerated towards the positive electrode.
The term "Iraqi nuclear physicists" typically refers to scientists and researchers in Iraq who specialize in nuclear physics and related fields, including nuclear engineering, nuclear chemistry, and radiation science. Historically, Iraq has had a nuclear program, especially during the late 20th century, which aimed at developing nuclear technology for various purposes, including energy production and scientific research. This program was notably active during the regime of Saddam Hussein.
Bohrium (Bh) is a synthetic element with the atomic number 107. It was first synthesized in 1981 and is named after the physicist Niels Bohr. Currently, several isotopes of bohrium have been produced, but they are all radioactive and have relatively short half-lives. The most notable isotopes of bohrium include: 1. **Bohrium-262 (Bh-262)**: This isotope has a half-life of about 5.6 milliseconds.
Selenium has several isotopes, which are variations of the element that have the same number of protons but different numbers of neutrons. The most stable and common isotopes of selenium are: 1. **Selenium-74 (Se-74)**: This isotope has 34 protons and 40 neutrons and is one of the most abundant isotopes of selenium.
Darmstadtium is a synthetic element with the symbol Ds and atomic number 110. It is part of the transactinide series of elements and was first synthesized in 1994. As of now, darmstadtium has no stable isotopes; all of its isotopes are radioactive.
Aluminium has several isotopes, but the most notable and stable isotopes are: 1. **Aluminium-26 (\(^26\text{Al}\))**: This is a radioactive isotope with a half-life of about 730,000 years. It is produced through cosmic ray interactions and is significant in astrophysical studies and in dating geological formations.
Flerovium (Fl) is a synthetic element with atomic number 114, and it is part of the superheavy elements in the periodic table. As of my last knowledge update in October 2023, there are very few known isotopes of flerovium, primarily because it is extremely unstable and has a short half-life.
Erbium (Er) has several isotopes, with the most stable and common isotopes being: 1. **Erbium-162 (Er-162)**: This is the most abundant stable isotope, comprising about 33.5% of natural erbium. 2. **Erbium-164 (Er-164)**: This is another stable isotope, making up about 1.6% of natural erbium.
Hydrogen has three main isotopes, which vary based on the number of neutrons present in the nucleus: 1. **Protium (^1H)**: This is the most abundant isotope of hydrogen, consisting of one proton and no neutrons. It is represented as \(^1H\) or simply H. 2. **Deuterium (^2H or D)**: This isotope contains one proton and one neutron, giving it a mass number of two.
Indium has two stable isotopes: \(^{113}\text{In}\) and \(^{115}\text{In}\). 1. **\(^{113}\text{In}\)** - This isotope has a natural abundance of about 4.3%. It is a stable isotope, meaning it does not undergo radioactive decay. 2. **\(^{115}\text{In}\)** - This isotope is the most abundant, accounting for about 95.
Gold (Au) has a few naturally occurring isotopes, the most common of which is gold-197 (^197Au). This isotope is stable and makes up nearly all naturally occurring gold. Gold-197 has an atomic mass of approximately 196.96657 u. In addition to ^197Au, there are several radioactive isotopes of gold, though they are not found in nature and are typically produced in laboratories or through nuclear reactions.
Nihonium (Nh) is a superheavy element with the atomic number 113. As of my last knowledge update in October 2023, nihonium has a few known isotopes, though due to its high instability and short half-lives, they are not found in nature and can only be produced artificially in laboratories.

Pinned article: Introduction to the OurBigBook Project

Welcome to the OurBigBook Project! Our goal is to create the perfect publishing platform for STEM subjects, and get university-level students to write the best free STEM tutorials ever.
Everyone is welcome to create an account and play with the site: ourbigbook.com/go/register. We belive that students themselves can write amazing tutorials, but teachers are welcome too. You can write about anything you want, it doesn't have to be STEM or even educational. Silly test content is very welcome and you won't be penalized in any way. Just keep it legal!
We have two killer features:
  1. topics: topics group articles by different users with the same title, e.g. here is the topic for the "Fundamental Theorem of Calculus" ourbigbook.com/go/topic/fundamental-theorem-of-calculus
    Articles of different users are sorted by upvote within each article page. This feature is a bit like:
    • a Wikipedia where each user can have their own version of each article
    • a Q&A website like Stack Overflow, where multiple people can give their views on a given topic, and the best ones are sorted by upvote. Except you don't need to wait for someone to ask first, and any topic goes, no matter how narrow or broad
    This feature makes it possible for readers to find better explanations of any topic created by other writers. And it allows writers to create an explanation in a place that readers might actually find it.
    Figure 1.
    Screenshot of the "Derivative" topic page
    . View it live at: ourbigbook.com/go/topic/derivative
  2. local editing: you can store all your personal knowledge base content locally in a plaintext markup format that can be edited locally and published either:
    This way you can be sure that even if OurBigBook.com were to go down one day (which we have no plans to do as it is quite cheap to host!), your content will still be perfectly readable as a static site.
    Figure 2.
    You can publish local OurBigBook lightweight markup files to either https://OurBigBook.com or as a static website
    .
    Figure 3.
    Visual Studio Code extension installation
    .
    Figure 4.
    Visual Studio Code extension tree navigation
    .
    Figure 5.
    Web editor
    . You can also edit articles on the Web editor without installing anything locally.
    Video 3.
    Edit locally and publish demo
    . Source. This shows editing OurBigBook Markup and publishing it using the Visual Studio Code extension.
    Video 4.
    OurBigBook Visual Studio Code extension editing and navigation demo
    . Source.
  3. https://raw.githubusercontent.com/ourbigbook/ourbigbook-media/master/feature/x/hilbert-space-arrow.png
  4. Infinitely deep tables of contents:
    Figure 6.
    Dynamic article tree with infinitely deep table of contents
    .
    Descendant pages can also show up as toplevel e.g.: ourbigbook.com/cirosantilli/chordate-subclade
All our software is open source and hosted at: github.com/ourbigbook/ourbigbook
Further documentation can be found at: docs.ourbigbook.com
Feel free to reach our to us for any help or suggestions: docs.ourbigbook.com/#contact